that's put romney on the defensive right when he was hoping to close the deal. >> this is a campaign about the 100%. >> reporter: campaigns always have slogans and statistics. >> the 53% or the 47%. >> reporter: but this year, instead of hope or change or even experience, it's a math lesson. >> 1% of the 99%. >> reporter: the statistics are the slogan. >> do you want four more years with unemployment above 8%? >> reporter: both candidates are playing the percentages. >> i think everybody tries to get their points made in quick, easy, short, memorable sound bites and percentages help do that. >> reporter: challenger trying to paint the incumbent as mr. 8.2%. >> people are trapped in a bad economy. >> reporter: the incumbent, trying to paint the challenger as mr. 47%. >> i'm barack obama, and i approve this message. >> reporter: fat cat from the 1% who paid just 14% in his taxes. who you like in this final jeopardy round probably depends on which percent your in. do you even know? well, unless you earn more than $380,000 a year, you're officially part of the 99%. rock stars and athlete